Question

can someone please help me with algebra i don't get it :)

Answer 1

What is your question

Answer 2

this is what it says:

Fill in the missing term so that the quadratic equation has a graph that opens up, with a vertex of
(– 3, – 25), and x intercepts at x = -8 and x = 2. (Do not include the negative sign in your answer.)

y = x2 + 6x − ___

Numerical Answers Expected!

Answer 3

@zepdrix he can probably help but Idk

Answer 4

ok thnx

Answer 5

@zepdrix can please help me on the question above?

Answer 6

sorry I could not help here so here is a medal for your inconvenience

Answer 7

thnx @Dobby1

Answer 8

Sorry I have a test in a couple hours :'c
I really really really need to cram.

I'll come back later if you're still stuck on this.
I'm sure you can find a smarty pants to help you out by then though c: hehe

Answer 9

ok thnx do you know someone who can help? @zepdrix

Answer 10

@Dobby1 can you help me with other questions?

Answer 11

I can try

Answer 12

ok!

Answer 13

Using graphing technology, approximate the solutions of 0.91x2 − 0.54x − 4.9 = 0.

x ≈ −2.32 and x ≈ 2.56

x ≈ −2.14 and x ≈ 2.44

x ≈ −2.18 and x ≈ 2.53

x ≈ −2.04 and x ≈ 2.64

Answer 14

@Hero can you try and see if you can help me with the first question please?

Answer 15

@ganeshie8 @mathstudent55

Answer 16

Let the unknown value = d

y = x2 + 6x − d

Input the vertex (x,y) = (-3,-25):

-25 = (-3)^2 + 6(-3) - d
-25 = 9 - 18 - d
0 = 9 + 25 - 18 - d
0 = 34 - 18 - d
0 = 16 - d
d = 16

Answer 17

is that for the first one sir?

Answer 18

Thus the equation is

y = x^2 + 6x - 16

Answer 19

For the second one, use a graphing calculator.

Answer 20

i do not have one sir

Answer 21

oh nevermind i found one


can you help with this one?
Identify the solutions of 3x2 − 7x + 4 = 0.

Answer 22

Use an online graphing calculator such as http://www.desmos.com

Answer 23

Identify the solutions of 3x2 − 7x + 4 = 0 do you know this one? and do you need answer choices for it?

Answer 24

Did you try using that graphing calculator?

No, I can figure all of these out without a calculator

Answer 25

um no i was going to do it later if you want you can help me

Answer 26

Okay, try factoring it. Find two numbers such that:
\(m \times n = 12\) and \(m + n = -7\)

Answer 27

any two numbers sir?

Answer 28

any two numbers that agrees with both equations, yes.

Answer 29

give e a second to think of it please

Answer 30

-3 and -4 i bielieve because a negative and a negative is a positive and -3 + -4 = -7 correct?

Answer 31

Okay, good, now replace -3 - 4 = -7 in the equation:
3x^2 -3x - 4x + 4 = 0

Now factor by grouping.

Answer 32

3x^2 - 7x + 4 = 0?

Answer 33

We already had that originally. We replaced -7x with -3x + -4x so that we can factor by grouping.

Answer 34

Factor this:

3x^2 -3x - 4x + 4 = 0

by grouping

Answer 35

oh so is it 4x^3 + 4 = 0?

Answer 36

No. I suppose you don't know how to factor.

Answer 37

wait is it -4x^2 + 4?

Answer 38

You can't do these if you don't know how to factor. There's no point.

Answer 39

please help me sir teach me whenever there is an exponent involved i get lost

Answer 40

Your best bet is to practice on a site like this:
http://www.ixl.com/math/algebra-1/factor-by-grouping

Answer 41

so you will not help me?

Answer 42

I can't really help right now. I have other stuff to do

Answer 43

can you just give me the answer really quick sir?

Answer 44

this is my question and answer choices
Identify the solutions of 3x2 − 7x + 4 = 0.

x = −1 over 3, x = −4

x = 1 over 3, x = 4

x = −4 over 3, x = −1

x = 4 over 3, x = 1